D.C. motor

A d.c. motor comprising:

• a stator core support structure having a centrally located rotor bearing support region disposed about an axis of rotation, said stator core support structure including a stator support assembly within said rotor bearing support region having a bearing surface region, a core mounting surface, and a cylindrical shaft mounted to extend from said bearing surface region coaxially with said axis of rotation;
• a magnetically permeable core structure supported at said centrally disposed opening upon said stator support assembly core mounting surface comprising a generally ring-shaped core base having a centrally disposed opening and a plurality of core-defining legs formed integrally therewith extending from the outer periphery of said core base, each said core-defining leg extending perpendicularly upwardly from said base in the vicinity of said periphery to form core components arranged in a predetermined generally circular locus;
• field winding means positioned about said core components and selectively excitable to effect actuation of said motor;
• and
• a rotor rotatable about said axis of rotation and supporting a predetermined number of permanent magnet components for interaction with said core components and selectively excited field winding means, said rotor including:
• a bearing sleeve rotatable about said axis above said bearing surface region and having an end surface spaced therefrom;
• bearing means mounted upon said shaft intermediate said shaft and said bearing sleeve for supporting and bearing sleeve for rotation about said shaft;
• hub means for drivably supporting a driven implement, fixed to said bearing sleeve, and extending therefrom over said core component circular locus to define a drive region;
• and
• magnetically permeable support ring means coupled in driving relationship with said bearing sleeve and positioned within said drive region for supporting said permeable magnet components.

A d.c. motor comprising:

• a stator core support structure having a centrally located rotor bearing support region disposed about an axis of rotation, said stator core support structure including a stator support assembly within said rotor bearing support region having a bearing surface region, a core mounting surface, a cylindrical shaft mounted to extend from said bearing surface region coaxially with said axis of rotation, and a stator support assembly flange portion extending from said core mounting surface;
• a magnetically permeable core structure supported at said centrally disposed opening upon said stator support assembly core mounting surface comprising a generally ring-shaped core base having a centrally disposed opening and a plurality of core-defined legs formed integrally therewith extending from the outer periphery of said core base, each said core-defining leg extending perpendicularly upwardly from said base in the vicinity of said periphery to form core components arranged in a predetermined generally circular locus;
• field winding means positioned about said core components and selective excitable to effect actuation of said motor and including an insulative bobbin having a bobbin flange portion extending outwardly therefrom adjacent said core base for retention thereupon by said stator support assembly, said bobbin supporting a wire field winding;
• and
• a rotor rotatable about said axis of rotation and supporting a predetermined number of permanent magnet components for interaction with said core components and selectively excited field winding means.

A d.c. motor comprising:

• a stator having a centrally disposed rotor axis;
• a plurality of magnetically permeable core components supported upon said stator along a locus of pole positions and each extending in generally parallel relationship with said rotor axis to an end surface to define a flux, interaction region;
• field winding means positionable about said core components and exictable for generating an induced field;
• a rotor rotatable about said axis and extending over said end surfaces of each said core component;
• a predetermined number of paired permanent magnet components located upon said rotor for movement along said locus of pole positions, each of said paired permanent magnet components comprising mutually spaced elongate segments spaced in substantially parallel relationship straddling each said core component and extending a select distance below the said end surface thereof when moved along said locus and configured for locally balanced radially directed magnetic interaction with each of said core components when located in flux transfer association therewith.

A d.c. motor comprising:

• a stator core support structure having a centrally located rotor bearing support region disposed about an axis of rotation and a core component support region disposed outwardly therefrom;
• a core structure positioned at said core component support region, comprising a generally ring-shaped first laminar core formed of a first predetermined number of superposed magnetically permeable first metal sheets, each said first metal sheet having a first core base extending from a first centrally disposed opening to an outer periphery and a predetermined number of core shaped first legs formed integrally therewith extending from said outer periphery, each said first leg extending substantially perpendicularly upwardly from said first core base in the vicinity of said outer periphery to form first core component portions, and a generally ring-shaped second laminar core formed of a second predetermined number of superposed, magnetically permeable second metal sheets, each said second metal sheet having a core base extending from an outer periphery to an inner periphery defining a second centrally disposed opening and a predetermined number of core shaped second legs corresponding with said predetermined number and shape of said core shaped first legs and extending upwardly from said inner periphery to form second core component portions, said first core component portions and said second core component portions being joined in mutual adjacency to form core components arranged in predetermined generally circular locus within said core component support region;
• field winding means positioned about said core components and selectively excitable to effect actuation of said motor;
• and
• a rotor rotatable about said axis of rotation and supporting a predetermined number of permanent magnet regions for interaction with said core components and selectively excited winding means.

A d.c. motor comprising:

• a stator assembly having a given axis;
• a rotor rotatable about said given axis and extending outwardly therefrom for supporting arcuately shaped permanent magnets having flux generation surfaces of select widthwise extent between the sides thereof for movement therewith along a circular locus, said magnets being magnetized having predetermined regions of alternating polarity asserted substantially coaxially with said given axis from said flux generation surfaces;
• a core structure mounted upon said stator assembly and having a plurality of radially alligned substantially concentric and mutually paired magnetically permeable core components having mutually inwardly disposed surfaces, each said core component extending in generally parallel relationship with said given axis to define a winding association region, a flux interaction region at said mutually inwardly disposed surfaces of each pair of said core components and an end surface, each end surfaces of each said pair of core components being located adjacent and at opposite said sides of said permanent magnets at a position beyond said flux generation surfaces selected for effecting flux coupling relationships substantially only with said flux interaction regions so as to minimize magnetic attraction therebetween along force vectors parallel with said given axis and to provide localized balancing of radially directed magnetization force vectors.